DJI is now selling a hardshell backpack for the Phantom. It looks like it holds 3-4 batteries and is priced at $149 directly from DJI. They also mention that it is waterproof "to a certain extent" and that likely means you can hike it in light rain. One of my favorite things about the Phantom is the ease of transport so this is a must buy for Phantom owners. I am just not flying my Inspire 1 as much as I should because of its size.